VoltDB is about performance by computing entirely in-memory and using a strict sharding architecture. It's unique that you interact through stored procedures th

VoltDB is about performance by computing entirely in-memory and using a strict sharding architecture. It's unique that you interact through stored procedures that are shared by the data so each node processes completely in parallel without any side-effects. It's more akin to other streaming/SQL processing engines like Spark rather than a fully functional SQL database. I highly recommend MemSQL (now called Singlestore) for a really polished distributed relational database that combines OLTP with OLAP columnstores.